71 Dart 410 stroker ..

Ok....IMM did two sets of heads for me....one SM and Eddy...both were bare....both got 2.055/1.60 Ferrea valves...both got PAC 1903 springs for flat tappet cam....both 63 cc....

SM

.100 74/56
.200 150/109
.300 205/150
.400 245/180
.500 272/200
.550 281/205
.600 290/209
.650 289/211